上海大金山岛森林群落调查与特征分析

通过对上海大金山岛植被类型的群落学调查和特征分析,发现大金山岛的主要森林群落有2种:野梧桐、青冈-石竹-鸭跖草、鳞毛蕨群落;红楠(青冈、野柿、野梧桐)-石竹-鳞毛蕨群落;它们的林下植物种类基本相似,均还处于演替较早阶段,植物多样性低,正在向地带性森林群落——以壳斗科植物为主的群落(青冈林)缓慢演替。建议对海岛地区在封山育林的基础上,采用已经引种驯化成功的优良树种,特别是壳斗科树种,通过采用林窗更新等技术进行林分改造,有目的地选留优良乡土树种,加以定向培育,可加速森林植被自然演替过程,使之及早达到稳定阶段。

Investigation and Analysis on Characteristics of Forest Communities in Dajinshan Island, Shanghai

The characteristics of forester communities and analysed were investigated in Dajinshan Island,Shanghai in this paper.The results showed that two main natural forest communities,Mallotus japonicus-Cyclobalanopsis glauca community and Machilus thunbergii-Cyclobalanopsis glauca-Diospyros kaki-Mallotus japonicus community,have been found in Dajinshan Island.Their species components under forest were similar and both on the original succession stages,and their bio-diversities were at a lower level.The two forest communities were slowly on succession for the regional forest community with the Fagaceae species as the dominance.The suggestion is that on the basis of closed forests,some managements,such as forest gap-regeneration,alteration,etc.should be adopted in order to accelerate the natural succession process.